Knife blade



FIG. 1 is a right, rear perspective view of a knife blade embodying the new design;

FIG. 2 is a left, front perspective view of a knife blade embodying the new design;

FIG. 3 is a right side elevation view of the knife blade;

FIG. 4 is a left side elevation view of the knife blade;

FIG. 5 is a top plan view of the knife blade;

FIG. 6 is a bottom plan view of the knife blade;

FIG. 7 is a front side elevation view of the knife blade; and,

FIG. 8 is a rear side elevation view of the knife blade.

The broken lines depict portions of the knife blade in which the design is embodied that are not considered part of the claimed design. 

CLAIM The ornamental design for a knife blade, as shown and described. 